package com.klun.hdfs.hd.mapper;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

public class WordCountMapper extends Mapper<LongWritable, Text,Text, IntWritable> {

    Text k = new Text();
    IntWritable v = new IntWritable(1);

    @Override
    protected void map(LongWritable key,Text value,Context context)throws IOException,InterruptedException {
        String str = value.toString();
        String[] words = str.split(" ");//空格分离
        for (String word : words) {
            k.set(word);
            context.write(k,v);
        }
    }
}
